Coupling-shoe



(No Model.)

0. W. DWELLE.

COUPLING SHOE.

I WITNESSES: llVl/E/VTOR I ATTOR/l/E) NITED STATES ATENT FFICE.

CHARLES WV. DlNELLE, ()F DENVER, COLORADO.

COUPLING-SHOE.

SPECIFICATION forming part of Letters Patent No. 444,340, dated January 6, 1891.

Application filed April 14,1890. Serial No. 347,899. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES W. DWELLE, a citizen of the United States,residin g at Denver, in the county of Arapahoe and State of Colorado, have invented certain new'and useful Improvements in Coupling-Shoes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in shoes for joining or coupling the extremities of the hoops surrounding Wooden pipes, conduits, or tanks, the object of my invention being to form a shoe of the class stated, which shall be simple in construction, economical in cost, easily operated, reliable, and durable in use.

To these ends myinvention consists of the features hereinafter described and claimed.

In the drawings is illustrated an embodiment of my invention, in which drawings Figure 1 is a side elevation of my improved shoe, showing the same seated upon a pipe, which is shown in cross-section, the shoe uniting the extremities of the hook surrounding the pipe. Fig. 2 is a top or plan view of the same. Fig. 3 is a section taken transversely through the shoe 0n the line A .13, Figs. 1 and 2.

In the views let thereference-numerals1 1, &-c., indicate wooden slaves composing a pipe or conduit surrounded by the hoop 2, provided with threaded extremities 3. The extremities of this hoop are united by my improved shoe 6, said shoe being closed at the top and provided with grooves 7, open at the bottom and fashioned to receive the extremities of the hoop. This shoe is provided with the central wall 8, separating the slots 7, and having wings or projections 9, extending from the body of the shoe in either direction, as shown. This central wall extends a little below the outer walls 10 10. The face of wall 8, together with its projecting Wings engaging the pipe, is preferably rounded, as shown at 11, and forms a rib engaging the pipe between the points where the extremities of the hoop leave the same preparatory to engaging the shoe or being united thereby.

As before stated, the rib 8 projects below the bottom of the corresponding side walls 10, and is designed to indent the pipe to the same extent as the engaging portion of the surrounding hoop in the same manner as if an endless hoop were crowded thereon and grasped the pipe with the same tightness. Hence the result must be to preserve the shape of the pipe or keep it in the shape of a perfect cylinder, since the pressure, together with the resulting indentation on the entire line of the circumference marked by each hoop is uniform.

The ordinary coupling-shoe having a flat surface of considerable extent does not indent the pipe, but crushes, presses, or flattens it, so to speak, into the shape of an ellipse or a shape elliptical in cross-section. One of the objects of my improved shoe is to overcome this result, and this object I accomplish by the rib 11, formed upon the bottom of wallS and its projections 9, and engaging the pipe between the points where the hoop is tangential thereto, as before stated.

My improved shoe is further provided with shoulders 12, forming seats for the nuts 4:, screwed upon the threaded extremities 3 of the hoop. IVashers 5 are shown directly engaging these shoulders beneath the nuts. These washers and nuts are supported from below by shoulders 13 and 14, formed on top of the central and outer walls, respectively, of the shoe. This provision overcomes any tendency which the extremities of the hoop might have to slip downward on grooves 7 after the nuts have been screwed thereon.

In the use of myimproved shoe itis placed over the extremities of the hoop to be joined thereby, these extremities entering and occupying the slots 7 7, as shown. The nuts are then screwed upon the extremities of the hoop until they engage the shoulders 12 of the shoe, or the washers 5 directly engaging these shoulders and forming seats for the nuts.

Having thus described my invention, what I claim is 1. A coupling-shoe for uniting the extremities of hoops surrounding pipes, conduits, or tanks, said shoe being provided with a longitudinal rib projecting vertically below the under surface of the described.

2. A coupling-shoe with slots open on the bottom and provided with the central dividing-wall S, projecting longitudinally beyond each end of the shoe, substantially as and for the purpose described.

3. A coupling'tshoc for uniting'the extremities of hoops surrounding pipes or tanks, said shoe havingslots open on the bottom divided by the central dividing-wall 8, projecting-longitudinallybeyond each end of the shoe and vertically below the side walls of the slots, so as to forma longitudinal rib adapted to bear upon thetank or pipe to the same extentand in the same manner as the contact portion of its connecting hoop, substantially as described.

4. A coupling-shoe with slots open on the bottom, said slots being provided with the side walls 10, and the central dividing-wall 8,projecting longitudinally beyond the ends of the shoe and vertically below the side walls of the slots, substantially as described.

5. A coupling-shoe with a central longitudinal rib or projection on its under side, said shoe, substantially as rib projecting below the adjacent partof the shoe, substantially as and for the purpose set; forth.

(3. A coupling shoe open at the bottom and provided with the central wall 8, the outer walls 10, and shoulders 12, forming seats for nuts screwed upon the extremities of hoops united by the shoe, and shoulders 13 14-, adapted to support the nuts from below when screwed to their seat, substantially as described.

T. A couplingshoe provided with two slots open on the bottom for the reception of the extremities of a suitable hoop surrounding a pipe or tank, said slots being provided with the side walls 10 and the central dividingwall 8, this wall projecting vertically below the side walls, so as to form a rib adapted to indent the pipe or tank before the side walls engage the same, substantially asdescribed.

In testimony whereof I aftix my sigmtture in presence of two witnesses.

Witnesses:

WM. MCCONNELL, JOHN \VESTON. 

